geico. 15 minutes could save you 15 % or more on car insurance. someone get me a latte will ya, please? >>> a pair of business titans, bill ackman and carl icahn squared off today and it was explosive. the grudge has been building a long time and it boiled over on "fast money halftime report." >> larry, their feud goes back a decade when bill ackman was a young hedge fund manager who did a deal with carl icahn, who was already an investing legend. most recently it's turned to herb herballife and today it all spilled out on live tv. >> 330 slides, not scaring people but going through the facts about the company. we did exhaustive research over the year and a half. we'll either be proven right or wrong. we shorted the stock, we've not covered our shares and we have more to come, by the way. we have some question, the company has been us the opportunity to ask, we will have responses for every issue they raised in their response of the presentation to us. what i thank carl for is he certainly helped high low pressure herbalife. congratulations on a g